Chapter 1
MRS GREN is a abbreviation for the process that makes a living organism an organism.
Movement - Is an action of an organism or a part of an organism causing a change in position or place.
Respiration - Is a chemical reaction in the cells which break down nutrients and release energy for Metabolism.
Sensitivity - Is an ability to detect and respond to changes in the internal or external environment.
Growth - Is a permanent increase in size or dry mass.
Reproduction - Is a process of making more of the same kind of an organism.
Excretion - Is a removal of waste products from metabolism and substance in excess of requirement.
Nutrition - Is a taking in of materials for energy, growth and reproduction.
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*I wrote all this without copying or referring to any other book.